1: 72 percent / TFA; aq. HCl / 0.33 h / 55 °C 2: 83 percent / (CH3)2S*BH3 / tetrahydrofuran / 0.25 h / 0 °C View Scheme

hydrogenchloride; trifluoroacetic acid T=55°C; 0.333333 h;

1: 72 percent / TFA; aq. HCl / 0.33 h / 55 °C 2: 83 percent / (CH3)2S*BH3 / tetrahydrofuran / 0.25 h / 0 °C 3: 63 percent / PBr3 / 1 h / Heating View Scheme